package com.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.MySessionContext;

import sun.awt.RepaintArea;

public class LoginFilter implements Filter {

	@Override
	public void destroy() {
	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {
		HttpServletRequest req = (HttpServletRequest) request;
		HttpServletResponse res = (HttpServletResponse) response;
		HttpSession session = req.getSession();
		if (session.getAttribute("user") != null)
			chain.doFilter(request, response);
		else {
			String sessionId = request.getParameter("sessionId");
			if (session != null && !session.equals("")) {
				MySessionContext myc = MySessionContext.getInstance();
				HttpSession mySession = myc.getSession(sessionId);
				if (mySession != null && mySession.getAttribute("user") != null) {
					chain.doFilter(request, response);
				}
			}
			//chain.doFilter(request, response);
			res.sendRedirect("/HouseRent/page/login.jsp");
		}
	}

	@Override
	public void init(FilterConfig filterConfig) throws ServletException {
		// TODO Auto-generated method stub
		
	}

}
